North American Network Operators Group
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Re: MTU path discovery and IPSec
- From: Steven M. Bellovin
- Date: Wed Dec 03 11:27:55 2003
In message <120320031605.8838.1dea@comcast.net>, jgraun@comcast.net writes:
>
>Two questions:
>
>1) I assume MTU path discovery has to been in enabled on each router in the pa
>th in order for it work correctly?!
No -- it only has to be enabled on routers with smaller outbound MTUs
than inbound. A router for which all links have a 1500-byte MTU
doesn't need path MTU discovery; it will never need to fragment
anything.
--Steve Bellovin, http://www.research.att.com/~smb
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